题目选项分析

In order to increase profits during a prolonged slowdown in sales, the largest manufacturers of automobiles in the United States have instituted record-setting price increases on all their models. The manufacturers believe that this strategy will succeed, even though it is inconsistent with the normal relationship between price and demand.

The manufacturers' plan to increase profits relies on which of the following assumptions?

【选项】New safety restraints that will soon become mandatory for all new cars will not be very costly for manufacturers to install.